Satisfaction with the current smorgasbord of Republican presidential candidates is high: 86 percent think at least one of the declared candidates could beat Democratic President Barack Obama, according to a new Des Moines Register Iowa Poll.

But enough people are open to changing their minds (69 percent) or do not have a first choice (14 percent) that there’s plenty of room for game-changing action – or for a latecomer such as Rick Perry, a conservative Texas governor, who has said he’s considering a run. Likely caucusgoers who are familiar with Perry and another noncandidate, New Jersey Gov. Chris Christie, find them attractive possibilities.

The poll asked respondents whether they had a favorable or unfavorable impression of several prominent Republicans in addition to those now in the running for president. Minnesota Rep. Michele Bachmann has the highest net favorability among those listed, rating at plus-53 points. (Net favorability subtracts those who view a candidate unfavorably from those who view the candidate favorably). She is followed by former Minnesota Gov. Tim Pawlenty at plus-45 points.

But some noncandidates did well. Perry ranks next at plus-35, and Christie follows at plus-31.

Wisconsin’s Paul Ryan, the budget-cutting congressman, has a net favorability of plus-25.

Sarah Palin, the former vice presidential nominee and Alaska governor, continues to polarize. Fifty-eight percent view her favorably, but 37 percent view her unfavorably, for a plus-21 spread.

Former New York Mayor Rudy Giuliani also divides respondents sharply, with a net of plus-1.

Fred Karger, an openly gay candidate from California, has the highest unfavorability rating of any declared or potential candidate tested, for a net of minus-42.